Driving device for gas-engine fans.



G. J. LOOMIS.

DRIVING DEVICE IOR GAS ENGINE FANS. APPLICATION FILED rmml, 1907.

Patented June 13,1911.

l l@ 2,7 I af 224 Wmme/.s

- To all'ivhom 'it may` concern:

GILBERT as PATENT crimen.

a'. Looms, ,or am, PENNSYLVANIA, AssIeNnia 'ro 'MODERN 'rooL-comPAN-Y,

, OF EME, PENNSYLVANIA, A CORPORATION' 'OF PENNSYLVANIA.

v`DEtI'VIlfTGt DEVCE FORQAS-ENGINE FANS.

I Specification of Letterslatent. Patented June 13, '1911.

'Appneaepnmea February n, 1907. serial No. 356.689.

will be hereinafter fully described and pointed out in the claims. p

Fans have Vheretofore been used in-connection'with engines for insuringa circulation of air about the engine cylinders or radiator or condenserfor the purpose of cooling the saidbdevices. When the engine is runningwith a light load, but at high speed, the cylinder, radiator orcondenser is not so highly heated as when the engine is running slowerbut with agreater load, while on the other hand, the fan is runnin at ahigher velocity with a light load and higher speed than with a heav loadand slow speed. If the fanis speede up to take care of the heavy load atlow speed, this speed will be beyond the limit of safety for thefan'when the engine y shaft. A. fan sha t is running at the -higherspeed incident to the .lighter load.` l

The object of this invention is to vary, preferably automatically, therelative speeds 4of the lfan and the engine so that the fan may be givena maximum velocityl with the 10W speed of the engine, and this velocityis so varied as the engine is speeded upas to keep the velocity of thefan within the limits of safety.

An exemplication of the invention is illustrated in the accompanyingdrawing in connection with an air cooled gas engine, wherein:

1 marks the engine cylinder; 2 the crank l 3 is supported by a post 4extending upwardly from the envine. Any desired means of securing theshaft to the post may be used. rlhe opposite end of. Athe shaft issupported bythe bar 5 extend- .lngfrom a plate 6. This-plate 6 will, inthe Ordinar use of the invention, be some part of the rame ofanautomobile or other apparatus in which the engine may be used.

The fan 7 is mounted on a sleeve 8. Illhis sleeve has the ballcup9formed init which is opposed to the cone l0 on the shaft 3. The endofthe sleeve -is screw threaded at 11 and the ball cup-9 is screwed intothis end and is opposed to the cone 13 onthe shaft 3.- .Balls 14 and 15are arranged between the cups 9 and 12, and cones 10 and 13,respectively, completing the ball bearin for the fan. A pulley 16 ismounted on a allbearing comprising the grooved ring .1.7 secured to thesleeve 8, the ooved ring 18 secured to the pulley and t e balls 19larranged in .these grooves.

The pulley 16 hasextending from it .the flange 20 which has aninternally arran ed cone friction surface, forming one mem er of afriction clutch. A cone frame 21 is provided with the ber face 22forming a cone friction Jsurface opposite the friction surface in theflange .20. The frame 21 is slidingly mounted on the sleeve 8 but visvsecured against rotation by the .feather or spline 23.

A spring 24; is tensioned between the frame 21 and the head- 25. Thehead 25 L1s fixed on the sleeve 8. The arms 26 are pivotally mounted onthe head 25 and carry the centrifugal weights 27. Links 28 extend fromthe frame 21'to the arms 26 and are so arranged that with an outwardmovement of the weights 27, the frame 21 1s drawn away from the flange2() so as to carry the cone surface on the frame 21 out of'engagementwith the cone surface on theilange 20. The

spring 24 tends to move the frame 21 so that the cone surfaces arebrought 1nto engageeol an as high engine increases, the weights 27acting "un-,-

der the inuence of centrifugal force, move outwardly and move the-coneframe 21 so as to decrease the frictional Aengagement between the conesurfaces and with a sumcient speed of the engine to move thesesurtrolling device forces the cone surfaces into engagement and thus themovement of the pulley is to a greater or less extent, comv municated tothe fan. At the slowest speed the strength of the spring is enoughgreater than the centrifugal force incident to the weights to give tothe surfaces such an en.- gagement as will communicate practically theentire movement of the pulley 16 to the fan.

What I claim as new is:

1. In a driving device for engine fans, the combination with anexplosive engine adapted to variable loads and speeds; and a fan adaptedto cool the engine of a driving connection between the engine and thefan comprising a frictional drlving mechanism and automatic means fordecreasing the frictional engagement of the mechanism as .the s eed ofthe engine increases.

2. al driving device for engine fans, the combination with an explosiveengine adapted to variable loadsand speeds; and

a 'fan adapted to cool the engine of a driving connection between theengine and the fan comprising a friction clutch and automatic means fordecreasing frictional engagement of the clutch as the speed-of theengine increases.

3. In a driving thecombination with an explosiveengine adapted tovariable loads and speeds; and a' fan adapted to cool the engine of adrivingconnection between the engine and the fan comprising a frictionclutch; and a centrifu ally actuated automatic means for decreasm thefrictional" engagement of the mechanism as the speed of the engineincreases.

4.. In a drivin device for engine fans, the combination wit an explosiveengine ada ted to variable loads and speeds; and a an i adapted to coolthe engine of a shaft 3 on f which the fan is mounted; mea'ns forsupporting the shaft tat each end; and a driving connection between thefan `and the' engine mounted on said shaft and compris- -ing a frictionclutch Cand automatic means for decreasing the frictional engagement of"the clutch as the speed of the engine inl creases.

l5.l adriving device foi' engine fans, the combinationwith an explosiveengine adapted to variable loa'dsand speeds; and a fan 'adapted to coolthe engine of a'shaft 3;'a

sleeve mounted onV said shaft and on which the fanis mounted a pulleyjournaledV on said device for engine fans,

sleeve and carrying one of-the members of a friction clutch; the secondmember of the friction clutch slidingly mounted on the sleeve; acentrifugally actuated device for moving the clutch membersv out ofengagement as the speed increases and for moving said members intoengagement as the speed decreases; and means for driving the pulley fromthe engine. l

6. In a drivingdevic'e for engine fans, the combination with anexplosive engine adapted to variable loads and speeds; and

a fan adapted to cool the engine of a shaft 8; a sleeve 8 mounted onthe'shaftv 3 and on which the fan ismounted; a pulley 16 journaled onthe sleeve and having the lian e 20 with the internally arranged'conesur ace; 'the opposing cone surface slidingly mounted on the sleeve andlocked against rotation thereon; the head 25 fixed on the sleeve; thespring 24 tensioned between thehead and said opposing cone; the arms-26pivoted on the head; the weights 27 carried by the arms; and the links28 connecting the arms with said opposing cone, the links and arms`being arrangedto move the clutch members out of enga ement as theweight moves outwardly un er the influence of centrifugal force.

7. In a driving device for enginev fans, the combination with anexplosive engine adapted to variable loads and speeds; and a fan adaptedto'cool the engine of a driving connection between the engine and thefan comprising'a shaft on which the fan is mounted; a support for oneend of said shaft secured to the engine; a friction driving mechanismmounted on the shaft; and

the combination with an' explosive englne adapted to variable loads andspeeds; and a fan adapted to cool the engine' of a shaft on which thefan is supported; supports'for both ends of said shaft; a frictionaldriving mechanism mounted on theshaft; means for rcommunicating themovement of the engine to said mechanism; and means for automaticallydecreasing thefrictional engagement of said mechanism as the speed ofthe engine increases. 1

9. In a drivingjdevice combination with an explosive engine ada ted tovariable loads and speeds; and a an adapted to cool the engine'of adriving connection between the engine and. the fan comprising `a clutchand automatic means for throwing the clutch into and outof engagement as`the speed of the engine decreases and increases respectively. Y' Q l l10. In a drivingidevice for engine fans, the vcombination with anexplosive engine adapted to variable loads and speeds; and a for enginefans, thev fan adapted to cool ihe engine of a. driving driving devicewhen the speed of the engine 10 conneenonv between the engine and thefan increases.

comprising a,v driving device having a driv- In testimony whereovI havehereunto set ing and a' driven member; and means for my hand in' thepresence of two Subscribing varying the driving relation between said,wltnesses.

membersU as-the" speed of the engine varies GILBERT J. LOOMIS toincrease the 'driving effect of the driving I V`Wii;nesses: .device asthe speed of the engine decreases, C. D. HIGBY,V

and to decrease the driving Aeffect; of the B. F. PARKER.

